navodaya
Exam
Numerical Ability
Number System
In a two digit number ,the unit's digit is twice the ten's digit .if 27 is added to the number, the digits interchange their places.the number is
Read Solution (Total 1)
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- 36
Let the digits at unit place=x and tens place=y, then the two-digit number=10y+x
Given, x=2y ---(i) and
(10y+x)+27 = 10x+y => x -y = -3 ---(ii)
Solving (i) & (ii), x=6, y=3
Hence the required number=10y+x=10*3 + 6 = 36 - 6 years agoHelpfull: Yes(0) No(0)
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